unarbitrary vs prescribed

unarbitrary and prescribed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unarbitrary	No	Yes	No	No
prescribed	No	Yes	No	No

unarbitrary (adjective)	prescribed (adjective)
not subject to individual determination	formally laid down or imposed
	set down as a rule or guide
	conforming to set usage, procedure, or discipline
	fixed or established especially by order or command